Major Section: EVENTS
Please see set-default-hints, see add-default-hints, and
see remove-default-hints for how to use this table.  For completeness, we
mention here that under the hood, these events all update the
default-hints-table by updating its unique key, t, for example as
follows.
(table default-hints-table t
       '((computed-hint-1 clause)
         (computed-hint-2 clause
                          stable-under-simplificationp)))
The use of default hints is explained elsewhere; see set-default-hints.